General structure and function of automobile hose

The automobile pipeline mainly consists of a rubber pipe and a metal pipe. He is responsible for the transmission of oil, water, antifreeze, gas and hydraulic pressure. Among them, the rubber pipe has the most types, and is the main component of the automobile. The automobile hose is opposite to the metal. The tube is soft, the preform is single, and the shape is variable; therefore, the rubber tube is often used in the cooling, air conditioning and power steering lights.

The main material of automobile hose is generally EPDM rubber, nitrile oil resistant rubber, neoprene rubber, fluorine rubber, ethylene propylene rubber, etc.; automotive hose requires a large ambient temperature range; from -40℃ to +120°C should be used normally It has corrosion resistance and aging resistance; it also has certain hardness and tensile strength.

Although the automobile hose structure of different purposes is different, it is generally divided into three parts: the inner layer of the hose, the intermediate reinforcement layer and the outer layer. The inner layer is the layer of the hose hose directly contacting the transmission medium, which plays the role of guiding and sealing. The inner layer should have a certain thickness and can withstand temperature and corrosion. The reinforcing layer is the part of the hose that bears the pressure and has considerable supporting strength; the function of protecting the hose structure is increased to withstand the pressure; the outer layer is the protective layer of the rubber tube, which plays a role of defense, and should have a certain thickness, temperature resistance, corrosion resistance, Anti-friction, anti-aging and other effects.

Automobile hoses are divided into low-pressure pipes, high-pressure pipes and oil-resistant pipes; low-pressure pipes are mainly used in cooling systems and heating systems, oil-resistant pipes are mainly used in fuel supply systems, and high-pressure pipes are used in braking systems.

Open the engine compartment to see cooling water pipes, air conditioning hoses, heater hoses, vacuum hoses and steering assist hoses; and invisible brake hoses; different uses, different media for transport, automotive hose materials and processes are also very Great difference; for example, the cooling hose, the heater hose and the boost hose are basically two-wire one-line structure; the brake brake tube is a multi-layered sandwich structure.